ClearChanges not working

[BrianPeek]

This issue was imported from CodePlex

peekb wrote 2013-11-22 at 10:36
I worte following code but can't clear motor "RawValue"

private async void btnClearD_Click(object sender, RoutedEventArgs e)
{
    await this.Brick.DirectCommand.ClearChanges(InputPort.D);

    this.MotorD.Update(this.Brick);
}

Where I do wrong?